Diestock lubricator



W. My LENNAN.

DIESTOCK LUBRIGATOR.

APPLICATION FILED OCT. 8. 1919.

1,410,329. Patented Mar. 21, 1922.

Inventor. WM 7 (W emrsn stars;

WILLIAlVLll/L LENNAN, 01*" TORONTO, ONTARIO, CANADA.

DIESTOCK LUBIR-ICATOR.

Specification of Letters Patent. I Patented Dial. 21, 1922.

Application filed October 8, 1919. Serial No. 329,323.

To all whom it may concern.

Be it known that I, l VILLIAM M. LENNAN, a citizen of the United States of America, and resident of the city of Toronto, county of York. Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Diestock Lubricators, described in the following specification and illustrated in the accompanying drawings, that form part ot the Th principal objects of the invention are, to facilitate the oiling ot the chasers of a pipe threading tool, and to devise a simple and etlicient form of oiling device which may be attached to any die stock and will effect a very material saving of the mechanics time and. will also save considerable oil The principal featur of the invention consists in the novel construction of an oiling chamber adapted to be attached to the die stock at one of the handle fittings and of the novel means of controlling the flow of oil from the chamber.

The drawing represents a longitudinal mid-sectional view of my improved device.

Various forms of lubricating devices for die stocks have been proposed but such devices as far as I am aware are extremely limited. in their oil capacity and either require a special construction of die stock or are quite complicated and therefore expensive, and in view oi these conditions are objectionable and it the purpose of this invention to provide a simple, eilective and inexpensive device.

Referring to the accompanying drawing, the die stock 1 is of the ordinary type having the threaded lug extensions 2 to which the handles are secured which handles are ordinarily formed of a length of pipe.

My improved device is adapted to be inserted into one of the handle lugs and it consists of a threaded shank 3 threaded into the lug 2 having an enlarged outer end 4- which terms the head of the oil chamber.

The oil chamber is formed of a cylindrical shaped casing 5 threaded on to the head 4: and having its outward end 6 reduced. to term the handle extension.

A piston 8 is arrange within the oilchamher 5 and connected thereto is a stem 9 which extends into the handle extension 6 and has seouredto its outer end a block 10 which slides freely within the handle.

The handle 6 is provided with a longitudinal slot 11 having a notch 12 in one side thereof at the outer end and a pin 13 is secured in the block 10 and extends through said slot. This pin is provided for the purpose of drawing the piston to the outward end of the oil chamber which may be held in the outward position by turning the pin in the notch 12.

A spiral spring let is arranged within the inner end of the oil chamber and engages the piston and is adapted to move thepiston toward the head end of the oil chamber when the pin 13 is released from the notch 12.

The head 4 is provided with an opening 15 through which a supply of oil is placed in the chamber 5 being closed by a threaded plug 16.

The head at is also provided with an oblique opening 17 communicating with the interior of the oil chamber. This opening is provided with a small central hole 18 at the outer end in which a valve stem 19 is supported.

The valve stem extends through the opening 17 and is provided with a valve 20 at the inner end adapted to close the opening.

It will be noted that the pressure placed upon the oil within the chamber 5 by the spring 14: acts against the valve 20 to hold it closed. A coil spring 21 encircles the outer end or the valve stem 19 under the head 22 and ensures the closing of the valve.

A hole 23 connects with the oblique opening 1'? and extends to the outer face.- of the head and a small pipe 24 is secured in the enlarged outer end of this hole and extends over the die stock, the terminal end thereof being turned inwardly toward the tool and arranged to direct the oil upon the chasers.

In order to apply this device to a die stock it is merely necessary to remove the oil pipe 24 and after removing the handle from the die-stock inserting the lug 3 and looking it in position by means of the lock nut 25. The oil pipe 2% is then placed in position and bent to direct the oil into the proper place. The piston is then drawn up by means ot the pin 18 and locked in its outward position against the pressure of the spring 14. The plug is then removed from the opening 15 and the oil. chamber is filled with oil.

Th plug is again replaced and the device is ready for use. The pin 13 is released from the notch 12 and the spring let creates a pressure upon the oil Within the chamber.

WVhen the operator desires to place oil upon the Chasers in the die he merely presses upon the head 22 ot' the valve stem 19, thus moving the valve 20 from its seat and the oil under pressure flows out through the opening 1'? and hole 23 to and through the pipe Immediately the valve 20 is re leased the spring 21 together with the pressure acting against the valve closesxthe same and stops the flow of oil.

It will be seen from this description that the device is extremely simple; is very positive in its action and will ensure the placing of the oil Where required and 'Whenever required as Well as giving the desired quantity. The oil chamber contains a considerable supply of oil rendering it unnecessary to refill the same, while the di is being used and asupply o't oil is positive nomatter What position the handle formed by the oil container may be in No alteration to the die stock is required and it may he therefore attached to any standard stock,

requiring no machining or alteration of any kind.

hat I claim as iny invention is 2- 1. A die stock lubricator, comprising an 'oil chamber, spring actuated means for maintaining a constant pressure upon the oil within said chamber, means for locking said spring means from exerting pressure 011 the oil, an oil tube leading from saidchamber to the die stock, and a valve for controlling the flow oi oil through said tube.

2. A .die stock lubricator, comprising a cylindrical oil chamber, a piston in said oil chamber, a stem secured to said piston and extending beyond said oil chamber, a slotted tube Vex-tension from said oil chamber 

